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US ZIP Code Profile

ZIP Code 78257
San Antonio, Texas

ZIP code 78257 is in San Antonio, located in Bexar County, Texas, within the San Antonio-New Braunfels metro area. Its 2020 Census population was 12,173. The estimated median adjusted gross income per tax return is $62,649, and about 21% of filers report $200,000 or more.

2020 Population
12,173
Census ZCTA
County
Bexar
FIPS 48029
Median income (est.)
$62,649
IRS SOI 2022
Land Area
38.928 mi²
+ 0.169 mi² water

01Location & Geography

Authoritative geographic identifiers from the U.S. Census Bureau, ANSI, and FIPS standards.

Primary CitySan Antonio, TX
CountyBexar County (FIPS 48029)
StateTexas (FIPS 48)
Metro Area (MSA)San Antonio-New Braunfels, TX Metro Area (41700)
Census Region / DivisionSouth Region · West South Central Division
Coordinates29.660484, -98.58345
Land / Water Area38.928 mi² land · 0.169 mi² water

02Income & Economics

Distribution of the 5,810 individual tax returns filed in 78257 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
21.3%
$25K–$50K
21.3%
$50K–$75K
14.5%
$75K–$100K
7.8%
$100K–$200K
14.5%
$200K+
20.6%
The $200,000+ bracket accounts for 78% of 78257's total adjusted gross income, from 21% of returns — a concentration that drives the gap between the median ($62,649) and the average.
Estimated median = median adjusted gross income per tax return, interpolated from IRS SOI brackets. Differs from U.S. Census household income.

03Income Over Time

Year-over-year change in 78257's IRS income metrics, 2020–2022.

Median income (2021→2022)
$62,649
▲ 1.8%
Filers earning $200K+
20.6%
▲ 0.4 pt
Total filers
5,810
▲ 1.6%
GET /zipc/v2/zipcodes/78257/soi?year=… $56K 2020 $62K 2021 $63K 2022
Median = adjusted gross income per return, interpolated from IRS SOI brackets. Figures are nominal (not inflation-adjusted).

04Population Trend

Decennial U.S. Census population for the 78257 ZCTA.

2000
2,415
 
2010
3,950
▲ +63.6%
2020
12,173
▲ +208.2%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number487980
City AliasesSan Antonio, Shavano Park

06Frequently Asked Questions

What county is ZIP code 78257 in?

ZIP code 78257 is in Bexar County, Texas (county FIPS code 48029).

What city is ZIP code 78257?

The primary USPS city for 78257 is San Antonio, TX.

What metro area (MSA) is 78257 in?

78257 is part of the San Antonio-New Braunfels, TX Metro Area (MSA code 41700).

What is the population of ZIP code 78257?

The 2020 Census population of 78257 was 12,173 residents.

What is the median income in ZIP code 78257?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 78257 is about $62,649, with around 21% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.